DS3231 is a low cost, extremely accurate I2C Real-Time Clock (RTC), with an integrated oscillator with temperature compensation crystal (TCXO) and crystal. The device incorporates a battery input, disconnect the main power supply and maintain accurate timing. Integrated oscillator improve the long-term accuracy of the device and reduce the number of components of the production line. The DS3231 is available in commercial and industrial temperature ranges, using a 300mil 16-pin SO package. RTC holds seconds, minutes, hours, day, date, month and year information. Note: This product is not an original Arduino product. Only one replacement accessories DollaTek
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